Gandalf pursued the Balrog from the depths of Moria.[1] On the peak they fought for two days and nights from 23 to 25 JanuaryT.A.3019.[2] During the battle, Durin's Tower was destroyed and the entrance to the Endless Stair was blocked. In the end, the Balrog was cast down and it broke the mountain-side as it fell. Gandalf himself died following this ordeal, but was later sent back to Middle-earth with even greater powers as Gandalf the White.[1]